=7.3/96%

=7.6 (ten thousand people)

2.( 1) 500/250% = 200 (mg)

(2) 200/( 1+ 150%)

=200/250%

=80 mg

(3)80 times (100%-37.5%)

=80X62.5%

=50 mg

3.260x90% = 234 (Yuan)

234/( 100%+30%)

=234/ 130%

= 180 (yuan)